Article
Construction & Building Technology
Boyu Zhou, Mo Zhang, Li Wang, Guowei Ma
Summary: Carefully selected GFRP fibers can significantly enhance the mechanical properties of mortar and reduce shrinkage, mainly attributed to improved porosity, increased fiber-cement adhesion, and protective role against alkali corrosion.
CEMENT & CONCRETE COMPOSITES
(2021)
Article
Construction & Building Technology
Levent Koroglu, Derya Over Kaman, Erhan Ayas
Summary: The study found that heat-treated boron derivative wastes used as replacements for Portland cement significantly affected the strength of mortars due to their particle size distribution. Smaller particle sizes decreased the strength of mortars, while larger particle sizes reduced the strength significantly.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Haoxin Li, Dayou Ni, Guangwei Liang, Yuchen Guo, Biqin Dong
Summary: Increasing curing temperature can enhance the strength of cement paste/mortar modified by VAEC dispersible powder, but excessively high temperature may have adverse effects. Elevated temperatures facilitate the formation of carboxyl-containing substances, refine pores, reduce the thickness of the polymer film, and increase pores in the polymer film.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Qiong Li, Hongxia Qiao, Aoyang Li, Guanjun Li
Summary: This study found that when the particle size of waste glass powder (WGP) was 20-44 μm and the content was 20%, the fluidity and compressive strength of the mortar were optimal. Additionally, the activity of WGP was more significant in the later curing period.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Guangzhou Wang, Hongya Zong, Zhen Zhang, Junxiang Sun, Fuhong Wang, Yongrui Feng, Shifeng Huang, Qinfei Li
Summary: This study investigated the possibility of recycling titanium gypsum (TG) as raw materials for cement-based self-leveling mortars and examined its effects on mechanical strength, fluidity, shrinkage, and wear resistance. The results showed that TG could improve the shrinkage and strength of the mortars, but reduced wear resistance.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Construction & Building Technology
Soukaina Ajouguim, Jonathan Page, Chafika Djelal, Mohamed Waqif, Latifa Saadi
Summary: This study aimed to valorize the Alfa plant into fiber-reinforced mortar and investigate the effects of different volume ratios and fiber morphologies on the mortar performance. The results showed that mortars reinforced with 1% volume fibers exhibited improved flexural strength, while increasing the volume ratio of fibers led to a decrease in compressive strength.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Multidisciplinary
Ahmed Salih Mohammed, Wael Mahmood, Warzer Sarwar Qadir, Kawan Ghafor, Rawaz Kurda
Summary: This article discusses the influence of two types of polymeric admixture on the stress-strain behavior of cement mortar. The characteristics of cement mortars modified with 0.20% polymeric admixtures are investigated. The addition of polymeric admixture reduces the water/cement ratio and improves the compression strength, but also makes the cement mortar brittle.
AIN SHAMS ENGINEERING JOURNAL
(2023)
Article
Construction & Building Technology
Afonso R. G. de Azevedo, Markssuel Teixeira Marvila, Bassam A. Tayeh, Daiane Cecchin, Artur Camposo Pereira, Sergio Neves Monteiro
Summary: This study evaluated the technological performance of adding acai fibre to mortars based on cement and lime, finding that acai fibres treated with NaOH solution can be used as reinforcement mechanism for mortar applications.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Construction & Building Technology
Yorly Alvarez, Maria Isabel Prieto, Alfonso Cobo
Summary: This study investigated the effects of reinforcing cement mortars with polypropylene (PP) fibers and cooling under different regimes after exposure to high temperatures. Adding 2 kg/m(3) of PP fibers improved the residual flexural and compressive strengths up to 300°C. Regardless of the cooling method, there were no significant differences in the mechanical properties of the mortar after exposure to high temperatures. The correlation between residual flexural and compressive strengths was determined to be acceptable, with a coefficient of determination (R-2) of 0.82.
Article
Construction & Building Technology
A. Moron Barrios, D. Ferrandez Vega, P. Saiz Martinez, E. Atanes-Sanchez, C. Moron Fernandez
Summary: Through experimental analysis of mortars, it was found that the addition of fibers can improve the mechanical properties of the material and reduce shrinkage, which is beneficial for the use of recycled aggregates in mortar manufacturing. Carbon fiber has been shown to be the best performing reinforcing material in this statistical analysis.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Engineering, Chemical
Xingguo Zhang, Xiayu Zhang, Yonggang Li, Kaili Hu, Desen Mao, Liang Luo, Tong Du, Hong Zhang, Kaiqiang Liu
Summary: This study investigated the effects of metakaolin and graphite on the properties of cement paste at high temperatures. The results showed that high temperatures changed the structure of C-S-H in the cement paste, causing damage to the microstructure and reduced mechanical properties. Metakaolin and graphite improved the mechanical properties by filling effect and accommodating uneven variation of hydration products, respectively.
Article
Construction & Building Technology
Junsheng Li, Wenyuan Ren, Aijun Zhang, Shuangcun Li, Jianping Tan, Hongtai Liu
Summary: The study focused on the feasibility and sand substitution mechanism of cement mortar mixed with iron ore tailings (IOT). Iron ore tailings cement mortars (IOTC) with different IOT content were made and tested. The research results showed the feasibility of using IOT to substitute standard sand in cement mortar, with an improvement in mechanical properties observed with increasing substitution rate.
Article
Construction & Building Technology
Yanika Aocharoen, Piya Chotickai
Summary: This study focused on the impact of recycled HDPE aggregates on the compressive mechanical properties and stress-strain relationship of cement mortar. It was found that substituting natural sand with HDPE aggregates negatively affected the modulus of elasticity and compressive strength, while also reducing density and increasing deformation capability. Relationships between parameters such as E-c, peak strain, ultimate strain, substitution percentage, and f(cmax) were established, and stress-strain models for HDPE mortars were successfully developed based on existing models for concrete.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2021)
Article
Construction & Building Technology
Samir Benimam, Mohamed Bentchikou, Farid Debieb, Said Kenai, Mohamed Guendouz
Summary: The study found that using plastic waste corrugated fibers can improve the tensile strength of mortar, while the water absorption and density rate are lower than that of ordinary mortar.
ADVANCES IN CONCRETE CONSTRUCTION
(2021)
Article
Engineering, Environmental
Shuqing Yang, Jian-Xin Lu, Chi Sun Poon
Summary: The study found that recycling waste glass into cement mortar can improve its high temperature compressive strength, but excessive use of glass materials can soften the mortar, requiring careful control of the dosage.
RESOURCES CONSERVATION AND RECYCLING
(2021)
Article
Construction & Building Technology
Jiayi Yuan, Xudong Chen, Nan Shen, Xiangqian Fan, Jun Lu
Summary: The correlation analysis in this paper revealed that fatigue load significantly affects the pore structure of self-compacting rubberised concrete, leading to deterioration as damage develops. Parameters of pore structure can serve as indices for predicting fatigue life.
ROAD MATERIALS AND PAVEMENT DESIGN
(2021)
Article
Engineering, Geological
Sixia Gong, Tao Zhao, Jidong Zhao, Feng Dai, Gordon G. D. Zhou
Summary: Slit dams are open-check barrier structures widely used in mountainous regions to resist the destructive impacts of granular flows. A numerical study using DEM showed that by adjusting relative post spacing and particle clump aspect ratio, the design of slit dams can be optimized to increase trapping efficiency.
Article
Engineering, Geological
Hongbo Du, Feng Dai, Mingdong Wei, Ang Li, Zelin Yan
Summary: The study finds that static confining pressure and dynamic loading rate enhance the load-carrying capacity of rocks, but the shear component limits the dynamic peak stress. With an increase in static confining pressure, the failure surface expands outward, while the compressive deformation modulus of rocks decreases with increasing shear component. The fragmentation behavior of rocks is restricted by static confining pressure and the shear component of dynamic loading, leading to a change in failure pattern as specimen inclination angle and static confining pressure increase.
ROCK MECHANICS AND ROCK ENGINEERING
(2021)
Article
Engineering, Multidisciplinary
Ruochen Jiang, Feng Dai, Yi Liu, Ang Li
Summary: This study developed a microseismic (MS) location method using the fast marching method (FMM) and a second-order difference approach, which was validated through numerical experiments and successfully applied to locate blasting activities and MS events. The method significantly reduced location errors, providing a more accurate rock fracture location.
Article
Engineering, Multidisciplinary
Ruochen Jiang, Feng Dai, Yi Liu, Ang Li
Summary: A new discriminant method is developed to automatically recognize Microseismic (MS) and blasting signals based on their time-frequency spectrum characteristics, providing more reliable data for MS monitoring analysis and reducing the impact of operators' subjectivity.
Article
Geosciences, Multidisciplinary
Weigang Shen, Tao Zhao, Feng Dai
Summary: This study investigates the influence of particle size on the buffering efficiency of a soil cushion layer through experimental and numerical tests. It is found that particle size can significantly affect the impact force, especially in high-velocity impacts. These findings offer insights for designing effective soil cushion layers for protection structures.
Article
Instruments & Instrumentation
Youzhen Li, Feng Dai, Wei You, Yi Liu
Summary: Understanding the fracture behavior of brittle rocks under dynamic mixed mode I/II loading is important for rock engineering structures. This study introduces a novel experimental method to investigate this fracture behavior, showing significant loading rate dependence of dynamic fracture toughness. The results demonstrate the feasibility and reliability of the method, revealing deviations in fracture path under mixed mode loading compared to pure mode loading.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2021)
Article
Engineering, Geological
Quanbo Luo, Feng Dai, Yi Liu, Mengtan Gao, Zongchao Li, Ruochen Jiang
Summary: This study focuses on the potential impact of large velocity pulses during earthquakes on buildings, extracting pulse parameters from the 1999 and 2018 earthquakes and evaluating their seismic response on structures. The results show that velocity pulses can cause severe damage to structures, and exceeding seismic design values in long-period spectral values can exacerbate the vulnerability of high-rise buildings to earthquakes.
ROCK MECHANICS AND ROCK ENGINEERING
(2021)
Article
Energy & Fuels
Xinying Liu, Feng Dai, Yi Liu, Pengda Pei, Zelin Yan
Summary: Research indicates that the dynamic tensile strength of naturally saturated specimens increases with loading rate, but decreases with pre-tension. Additionally, the dynamic strength of naturally saturated sandstone is lower than that of natural sandstone, with similar fracture behavior. Water effects on mechanical properties, water wedging effect, and Stefan effect explain the dynamic tensile behavior of rocks with static preload.
Article
Mechanics
Zelin Yan, Feng Dai, Yi Liu, Mingdong Wei, Wei You
Summary: This study investigates the progressive failure process of flattened Brazilian disc (FBD) specimen using digital image correlation technique and proposes a modified calculation method to determine mode-I fracture toughness KIC. Additionally, the cracking nature of secondary cracks and the second rise of loading force induced by compressionshear failure near the flattened ends of the FBD specimen are identified. These findings contribute to a better understanding of the progressive fracture mechanism of FBD specimens and enhance the accuracy of KIC calibration by FBD testing method.
ENGINEERING FRACTURE MECHANICS
(2021)
Article
Engineering, Geological
Zelin Yan, Feng Dai, Jianbo Zhu, Yuan Xu
Summary: This study systematically investigated the influences of pre-stress ratio, flaw inclination angle, and strain rate on the dynamic progressive cracking mechanism and energy evolution of multi-flawed rocks. The experimental results show that the dynamic/total strength generally increases with increasing strain rate, decreases with increasing flaw inclination angle, and exhibits complex changes with increasing pre-stress ratio.
ROCK MECHANICS AND ROCK ENGINEERING
(2021)
Article
Engineering, Mechanical
Zhiheng Wang, Yong Li, Weibing Cai, Weishen Zhu, Weiqiu Kong, Feng Dai, Chen Wang, Kai Wang
Summary: This study investigated the initiation mechanism of microcracks in fractured rock mass from the perspective of micromechanics, establishing macro-micro criteria to determine and distinguish the properties and types of cracks. It was found that the stress state of rock particles determines the type and propagation direction of cracks, allowing for an effective analysis of the initiation mechanism of different types of cracks and their propagation trends.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2021)
Article
Engineering, Mechanical
Mingdong Wei, Feng Dai
Summary: Laboratory-scale experiments were conducted on mixed-mode I/II fracture of non-oriented columnar saline ice, showing that temperature and loading conditions significantly influence the fracture behavior of ice. The results demonstrated that T-stress plays a crucial role in mixed-mode fracture of ice, with both trans- and inter-granular crack growth observed under different testing conditions.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2021)
Article
Construction & Building Technology
Ang Li, Feng Dai, Yi Liu, Hongbo Du, Ruochen Jiang
Summary: A novel dynamic method is proposed for evaluating the stability of high sidewalls subjected to flexural-toppling by integrating derived criterion, continuum modelling and microseismic data. The study defines a geo-mechanical model for analyzing toppling rock strata on high sidewalls and deduces potential energies equations using the Rayleigh-Ritz method. A quantitative stability evaluation methodology is presented considering progressive failure and the influence of fractures along bedding planes.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2021)
Article
Mining & Mineral Processing
Wei You, Feng Dai, Yi Liu, Hongbo Du, Ruochen Jiang
Summary: This study introduces a numerical servo triaxial Hopkinson bar (NSTHB) to investigate the dynamic responses of rocks under a true triaxial stress state. The results indicate that the increase in intermediate principal stress leads to an increase in dynamic strength and elastic modulus of rocks, while the dynamic elastic modulus remains independent of the dynamic strain rate. Additionally, the study shows that the intermediate principal stress significantly affects the dynamic failure modes of rocks.
INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY
(2021)
Article
Green & Sustainable Science & Technology
Lars odegaard Bentsen, Narada Dilp Warakagoda, Roy Stenbro, Paal Engelstad
Summary: This study investigates uncertainty modeling in wind power forecasting using different parametric and non-parametric methods. Johnson's SU distribution is found to outperform Gaussian distributions in predicting wind power. This research contributes to the literature by introducing Johnson's SU distribution as a candidate for probabilistic wind forecasting.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Xing Liu, Qiuchen Wang, Yunhao Wen, Long Li, Xinfang Zhang, Yi Wang
Summary: This study analyzes the characteristics of process parameters in three lean gas ethane recovery processes and establishes a prediction and multiobjective optimization model for ethane recovery and system energy consumption. A new method for comparing ethane recovery processes for lean gas is proposed, and the addition of extra coolers improves the ethane recovery. The support vector regression model based on grey wolf optimization demonstrates the highest prediction accuracy, and the multiobjective multiverse optimization algorithm shows the best optimization performance and diversity in the solutions.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Cairong Song, Haidong Yang, Xian-Bing Meng, Pan Yang, Jianyang Cai, Hao Bao, Kangkang Xu
Summary: The paper proposes a novel deep learning-based prediction framework, aTCN-LSTM, for accurate cooling load predictions. The framework utilizes a gate-controlled multi-head temporal convolutional network and a sparse probabilistic self-attention mechanism with a bidirectional long short-term memory network to capture both temporal and long-term dependencies in the cooling load sequences. Experimental results demonstrate the effectiveness and superiority of the proposed method, which can serve as an effective guide for HVAC chiller scheduling and demand management initiatives.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Zhe Chen, Xiaojing Li, Xianli Xia, Jizhou Zhang
Summary: This study uses survey data from the Loess Plateau in China to evaluate the impact of social interaction on the adoption of soil and water conservation (SWC) technology by farmers. The study finds that social interaction increases the likelihood of farmers adopting SWC, and internet use moderates this effect. The positive impact of social interaction on SWC adoption is more pronounced for farmers in larger villages and those who join cooperative societies.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Chenghua Zhang, Yunfei Yan, Kaiming Shen, Zongguo Xue, Jingxiang You, Yonghong Wu, Ziqiang He
Summary: This paper reports a novel method that significantly improves combustion performance, including heat transfer enhancement under steady-state conditions and adaptive stable flame regulation under velocity sudden increase.
JOURNAL OF CLEANER PRODUCTION
(2024)
